ASCO 551, 553 Series, 5 Way ¼” – ½” Pilot Operated Solenoid Valve
ASCO 551, 553 series 5 way ¼-½” pilot operated spool type solenoid valve is available in many different configurations and have TÜV certified IEC 61508 Functional Safety data and can be used up to SIL 4.
Each exhaust port of the spool is connectable providing enhanced environmental protection and is particularly recommended for sensitive areas such as clean rooms, and applications in the pharmaceutical and food processing sectors.
The ASCO 551, 553 series 5 way ¼-½” pilot operated valve offers environmental protection against the ingress of liquids, dusts and any other foreign matter and can be externally piloted (external air pilot supply) to convert valve to zero minimum operation by flipping a gasket.
ASCO 551, 553 Series, Pilot Operated Spool Type Solenoid Valve, Stainless Steel Body – General Specification
| Differential Pressure | Flow (Qv at 6bar) | Fluids | Seal Material | Temperature Range |
| 2-10bar (1bar = 100kPa) | ¼” 860l/m 5/2; 760l/m ½” 3000l/m |
Air, Inert Gas, Filtered | VMQ (Silicone) + PUR (Polyurethene) | -40C / +80C (ASCO 551 Series) -40 / +60C (ASCO 553 Series) |
ASCO 551, 553 Series, 5 way ¼-½ Solenoid Valve Additional Options
- Valves configured for external pilot air supply, TPL 20547
- Other pipe threads are available on request
- Ex mb/mD (prefi x “PV”) solenoid can be supplied with various cable lengths
- Compliance with “UL”, “CSA” and other local approvals available on request
- 1/2″ NPT (prefi x “T”) and M20 x 1.5 (prefi x “ET”) conduits (aluminium or 316 SS) available for steel solenoid housing
ASCO 551-553 solenoid valves are available with NAMUR interface. NAMUR, translated from the German acronym to StandardiSation Association for Measurement and Control in Chemical Industries, is the specification for a standard interface between pneumatic actuators, solenoid valves and directional control valves.
